The Enlightenment Elixir is used to upgrade the relics for your three types of troops: Infantry, Cavalry, and Archers, from within the Treasury.

It can be obtained in several ways:
1- From rewards of certain events, such as "Altar Of Trail" and "The Battle of the Holy Mountain".
2- By purchasing it from the packs available within the game store.
3- By purchasing it from "the Arena of Legends" store.